<template>
  <div>
    <!-- 面包屑导航区域 -->
    <el-breadcrumb separator="/">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>商品管理</el-breadcrumb-item>
      <el-breadcrumb-item>添加商品</el-breadcrumb-item>
    </el-breadcrumb>

    <!-- 卡片区域 -->
    <el-card>
      <!-- 警告框 -->
      <el-alert title="警告提示的文案" type="warning"> </el-alert>
      <!-- steps步骤条 -->
      <el-steps :space="200" :active="activeIndex - 0" finish-status="success" align-center>
        <el-step title="基本信息"></el-step>
        <el-step title="商品参数"></el-step>
        <el-step title="商品属性"></el-step>
        <el-step title="商品图片"></el-step>
        <el-step title="商品内容"></el-step>
        <el-step title="完成"></el-step>
      </el-steps>

      <!-- tags标 -->
      <el-form :model="addForm" :rules="addFormRules" ref="addFormRef">
        <el-tabs :tab-position="'left'" v-model="activeIndex" :before-leave="beforeTabLeave" @tab-click="tabClicked">
          <!-- 基本信息 -->
          <el-tab-pane label="基本信息" name="0">
            <el-form-item label="商品名称" prop="goods_name">
              <el-input v-model="addForm.goods_name"></el-input>
            </el-form-item>
            <el-form-item label="商品价格" prop="goods_price">
              <el-input v-model="addForm.goods_price"></el-input>
            </el-form-item>
            <el-form-item label="商品数量" prop="goods_number">
              <el-input v-model="addForm.goods_number"></el-input>
            </el-form-item>
            <el-form-item label="商品重量" prop="goods_weight">
              <el-input v-model="addForm.goods_weight"></el-input>
            </el-form-item>
            <el-form-item label="商品分类" prop="goods_cat">
              <el-cascader v-model="addForm.goods_cat" :options="catelist" :props="({ expandTrigger: 'hover' }, cateProps)" @change="addHandleChange"></el-cascader>
            </el-form-item>
          </el-tab-pane>

          <!-- 商品参数 -->
          <el-tab-pane label="商品参数" name="1">
            <el-form-item :label="item.attr_name" v-for="item in manyTableData" :key="item.cat_id">
              <!-- 复选框 -->
              <el-checkbox-group v-model="item.attr_vals">
                <el-checkbox border :label="ck" v-for="(ck, i) in item.attr_vals" :key="i"></el-checkbox>
              </el-checkbox-group>
            </el-form-item>
          </el-tab-pane>

          <!-- 商品属性 -->
          <el-tab-pane label="商品属性" name="2">
            <el-form-item :label="item.attr_name" v-for="item in onlyTableData" :key="item.attr_id">
              <el-input v-model="item.attr_vals"></el-input>
            </el-form-item>
          </el-tab-pane>

          <!-- 商品图片 -->
          <el-tab-pane label="商品图片" name="3">
            <el-upload :action="uploadURL" :headers="headerObj" :on-preview="handlePreview" :on-remove="handleRemove" :on-success="handleSuccess" list-type="picture">
              <el-button size="small" type="primary">点击上传</el-button>
            </el-upload>
          </el-tab-pane>

          <el-tab-pane label="图片预览" name="4">
            <quill-editor v-model="addForm.goods_introduce"></quill-editor>
          </el-tab-pane>
          <el-tab-pane label="完成">
            <el-button type="primary" @click="add">添加商品</el-button>
          </el-tab-pane>
        </el-tabs>
      </el-form>
    </el-card>

    <!-- 图片预览 -->
    <el-dialog title="提示" :visible.sync="previedialogVisible" width="34%">
      <img :src="previewPath" class="imass" />
    </el-dialog>
  </div>
</template>

<script>
import _ from 'lodash'
export default {
  name: 'Add',
  data() {
    return {
      activeIndex: '0',
      // 商品分类列表
      catelist: [],
      // 添加商品的表单数据
      addForm: {
        goods_name: '',
        goods_price: 10,
        goods_number: 10,
        goods_weight: 10,
        // 商品所属的分类数组
        goods_cat: [],
        // 图片的数组
        pics: [],
        attrs: [],
        // 介绍商品
        goods_introduce: ''
      },
      // 添加商品的表单验证规则对象
      addFormRules: {
        goods_name: [{ required: true, message: '请输入商品名称', trigger: 'blur' }],
        goods_price: [{ required: true, message: '请输入商品价格', trigger: 'blur' }],
        goods_number: [{ required: true, message: '请输入商品数量', trigger: 'blur' }],
        goods_weight: [{ required: true, message: '请输入商品重量', trigger: 'blur' }],
        goods_cat: [{ required: true, message: '请输入商品重量', trigger: 'blur' }]
      },
      cateProps: {
        label: 'cat_name',
        value: 'cat_id',
        children: 'children'
      },
      // 动态参数数据
      manyTableData: [],
      onlyTableData: [],
      // 上传的到根路径 url地址
      uploadURL: 'http://127.0.0.1:8888/api/private/v1/upload',
      // 图片上传组件的header请求头对象
      headerObj: {
        Authorization: window.sessionStorage.getItem('token')
      },
      previewPath: '',
      previedialogVisible: false
    }
  },
  computed: {
    cateID() {
      if (this.addForm.goods_cat.length === 3) {
        return this.addForm.goods_cat[2]
      } else {
        return null
      }
    }
  },
  created() {
    this.getCateList()
  },
  methods: {
    async getCateList() {
      const { data: res } = await this.$http.get('categories')
      if (res.meta.status !== 200) return this.$message.error('获取商品分类失败')
      this.catelist = res.data
      console.log(res.data)
    },
    // 级联选择器中的向变化，会触发这个函数
    addHandleChange() {
      if (this.addForm.goods_cat.length !== 3) {
        this.addForm.goods_cat = []
        return
      }
    },
    //
    beforeTabLeave(activeName, oldActiveName) {
      if (oldActiveName === '0' && this.addForm.goods_cat.length !== 3) {
        this.$message.error('请选择商品分类')
        return false
      }
    },
    async tabClicked() {
      // 获取动态参数请求
      if (this.activeIndex === '1') {
        const { data: res } = await this.$http.get(`categories/${this.cateID}/attributes`, { params: { sel: 'many' } })
        if (res.meta.status !== 200) {
          return this.$message.error('获取动态参数列表失败')
        }
        res.data.forEach(item => {
          item.attr_vals = item.attr_vals.length === 0 ? [] : item.attr_vals.split(' ')
        })
        this.manyTableData = res.data
      }
      // 获取静态参数请求
      if (this.activeIndex === '2') {
        const { data: res } = await this.$http.get(`categories/${this.cateID}/attributes`, { params: { sel: 'only' } })
        if (res.meta.status !== 200) {
          return this.$message.error('获取静态参数列表失败')
        }
        this.onlyTableData = res.data
        console.log(res)
      }
    },
    // 处理图片预览效果
    handlePreview(file) {
      this.previewPath = file.response.data.url
      this.previedialogVisible = true
    },
    // 处理移除图片的操作
    handleRemove(file) {
      const filePath = file.response.data.tmp_path
      const s = this.addForm.pics.findIndex(x => x.pic === filePath)
      this.addForm.pic.splice(s, 1)
    },
    //
    handleSuccess(response) {
      const picInfo = { pic: response.data.tmp_path }
      this.addForm.pics.push(picInfo)
      console.log(response)
    },
    // 添加商品
    add() {
      this.$refs.addFormRef.validate(async valid => {
        if (!valid) {
          return this.$message.error('请填写必选的表单项!')
        }
        // 执行添加的业务逻辑
        const form = _.cloneDeep(this.addForm)
        form.goods_cat = form.goods_cat.join(',')
        // 处理动态参数属性
        this.manyTableData.forEach(item => {
          const newInfo = { attr_id: item.attr_id, attr_vals: item.attr_vals }
          this.addForm.attrs.push(newInfo)
        })
        // 处理静态属性
        this.onlyTableData.forEach(item => {
          const onlyInfo = { attr_id: item.attr_id, attr_vals: item.attr_vals }
          this.addForm.attrs.push(onlyInfo)
        })
        form.attrs = this.addForm.attrs
        // 添加商品向服务发起post请求
        const { data: res } = await this.$http.post('goods', form)
        if (res.meta.status !== 201) {
          return this.$message.error('添加商品失败!')
        }
        this.$message.success('添加商品成功!')
        await this.$router.push('/goods')
      })
    }
  }
}
</script>
<style lang="less" scoped>
.el-steps {
  margin: 20px 0;
}
.imass {
  width: 440px;
  height: 440px;
}
.btnAdd {
  margin: 15px 0;
}
</style>
